Vinny wants nothing more than to become an Adventurer—someone who can climb Naru Tower. The only thing stopping Vinny is his parents, who do not have the money to let him become an Adventurer. It doesn't help that Vinny's Uncle Chris went missing after climbing to Floor Two, and Vinny's father hasn't wanted even to leave Floor One himself.

Everything changes when a stranger shows up in Vinny's life, and sells the teenager the one thing he needs to become an Adventurer. Everyone seems to be trying to stop Vinny in his dream, but the main person Vinny looks to for encouragement is Connor, his best friend. When Vinny's life changes, so Connor's life changes as well, but in a completely different way. Will the two boys, be able to make it through alive? Where is Stronghold Academy?